question_answer

A lizard, at an initial distance of 21 cm behind an insect, moves from rest with an acceleration of\[2\text{ }cm/{{s}^{2}}\]and pursues the insect which is crawling uniformly along a straight line at a speed of 20 cm/s. Then, the lizard will catch the insect after     AIEEE  Solved  Paper-2005

A) 24 s       

B)        21 s       

C)        1 s          

D)        20 s

Correct Answer: B

Solution :

Let lizard catch the insect C and distance covered by insect = S Time taken by insect,                ... (i) Distance covered by lizard According to the given condition,                          ...(ii)                                      [from Eq.(i)]